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SubTerra, Inc. Peabody Twentymile Coal, LLC April 11, 2016 <br />Subsidence Mitigation During 9 -East Undermining of the Energy Spur at the Foidel Creek Mine <br />Figure <br />No. <br />List of Figures <br />Description <br />1 General Vertical Stress Change and Displacement during Longwall Mining. <br />2 Maximum Subsidence vs Width/Depth for Wadge Seam Case Studies and Wolf <br />Creek Seam Predictions. <br />3 Prediction for Panels 9 -East and 8 -East — Near the 9 -East Start Room. <br />4 Travelling Subsidence for Panel 9 -East after Retreating 1000 -feet from the Start <br />Room. <br />5 Predicted Subsidence along the Energy Spur. <br />6 Energy Spur Gradient Before and After 9 -East Undermining <br />Drawing <br />No. <br />List of Drawings <br />Description <br />1 Peabody Twentymile Coal, Foidel Creek Mine — Vicinity Map. <br />2 Peabody Twentymile Coal, Foidel Creek Mine — Layout of Wolf Creek Seam Panels. <br />3 Energy Spur Railroad Alignment. <br />4 Energy Spur Railroad Sections 17+00 through 20+00. <br />5 Energy Spur Railroad Sections 21+00 and 22+00. <br />Table <br />No. <br />List of Tables <br />Description <br />1 Energy Spur Gradient Before and After 9 -East Undermining <br />Figures, Drawings, and Tables are located at the end of this report. <br />PN: 2016-10 <br />